Idioms

knock one's head against the wall
to waste time trying to do something with no success
The company manager's have been knocking their heads against the wall trying to solve the problem.

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  • knock oneself out (doing something)
  • knock the props out from under (someone)
  • know (someone or something) by sight
  • know (someone or something) like a book
  • know (someone or something) like an open book
  • know (someone or something) like the back of one's hand
  • know (something) backwards and forwards
  • know (something) by heart
  • know (something) from memory
  • know (something) inside out
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  • put (someone) up to (something)
  • lose out on (something)
  • round up (someone or something) or round (someone or something) up
  • on the hour
  • could do with (someone or something)
  • in the driver's seat
  • on the bandwagon
  • come down to (something)
  • bow out
  • in over one's head


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    Chameleons change their color by dispersing the concentration of pigment in their skin. This is controlled by the autonomic nervous system. Color changes are determined by external factors such as light and temperature as well as emotions. They do not change color to match their background.      .. More >>
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